package com.yangweiqiao.okhttp.ssl;

import java.io.IOException;
import java.io.InputStream;
import java.security.KeyManagementException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.UnrecoverableKeyException;
import java.security.cert.CertificateException;
import java.security.cert.CertificateFactory;
import java.security.cert.X509Certificate;

import javax.net.ssl.KeyManager;
import javax.net.ssl.KeyManagerFactory;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import javax.net.ssl.TrustManagerFactory;
import javax.net.ssl.X509TrustManager;

/**
 * @author vision
 * @function support the sslsocket
 */
public class HttpsUtils
{
	public static SSLSocketFactory getSslSocketFactory(InputStream[] certificates, InputStream bksFile, String password)
	{
		try
		{
			TrustManager[] trustManagers = prepareTrustManager(certificates);
			KeyManager[] keyManagers = prepareKeyManager(bksFile, password);
			SSLContext sslContext = SSLContext.getInstance("SSL");

			sslContext.init(keyManagers, new TrustManager[]
			{ new MyTrustManager(chooseTrustManager(trustManagers)) }, new SecureRandom());
			return sslContext.getSocketFactory();
		}
		catch (NoSuchAlgorithmException e)
		{
			throw new AssertionError(e);
		}
		catch (KeyManagementException e)
		{
			throw new AssertionError(e);
		}
		catch (KeyStoreException e)
		{
			throw new AssertionError(e);
		}
	}

	private static TrustManager[] prepareTrustManager(InputStream... certificates)
	{
		if (certificates == null || certificates.length <= 0)
			return null;
		try
		{

			CertificateFactory certificateFactory = CertificateFactory.getInstance("X.509");
			KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType());
			keyStore.load(null);
			int index = 0;
			for (InputStream certificate : certificates)
			{
				String certificateAlias = Integer.toString(index++);
				keyStore.setCertificateEntry(certificateAlias, certificateFactory.generateCertificate(certificate));
				try
				{
					if (certificate != null)
						certificate.close();
				}
				catch (IOException e)

				{
				}
			}
			TrustManagerFactory trustManagerFactory = null;

			trustManagerFactory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
			trustManagerFactory.init(keyStore);

			TrustManager[] trustManagers = trustManagerFactory.getTrustManagers();

			return trustManagers;
		}
		catch (NoSuchAlgorithmException e)
		{
			e.printStackTrace();
		}
		catch (CertificateException e)
		{
			e.printStackTrace();
		}
		catch (KeyStoreException e)
		{
			e.printStackTrace();
		}
		catch (Exception e)
		{
			e.printStackTrace();
		}
		return null;

	}

	private static KeyManager[] prepareKeyManager(InputStream bksFile, String password)
	{
		try
		{
			if (bksFile == null || password == null)
				return null;

			KeyStore clientKeyStore = KeyStore.getInstance("BKS");
			clientKeyStore.load(bksFile, password.toCharArray());
			KeyManagerFactory keyManagerFactory = KeyManagerFactory
					.getInstance(KeyManagerFactory.getDefaultAlgorithm());
			keyManagerFactory.init(clientKeyStore, password.toCharArray());
			return keyManagerFactory.getKeyManagers();

		}
		catch (KeyStoreException e)
		{
			e.printStackTrace();
		}
		catch (NoSuchAlgorithmException e)
		{
			e.printStackTrace();
		}
		catch (UnrecoverableKeyException e)
		{
			e.printStackTrace();
		}
		catch (CertificateException e)
		{
			e.printStackTrace();
		}
		catch (IOException e)
		{
			e.printStackTrace();
		}
		catch (Exception e)
		{
			e.printStackTrace();
		}
		return null;
	}

	private static X509TrustManager chooseTrustManager(TrustManager[] trustManagers)
	{
		for (TrustManager trustManager : trustManagers)
		{
			if (trustManager instanceof X509TrustManager)
			{
				return (X509TrustManager) trustManager;
			}
		}
		return null;
	}

	private static class MyTrustManager implements X509TrustManager
	{
		private X509TrustManager defaultTrustManager;
		private X509TrustManager localTrustManager;

		public MyTrustManager(X509TrustManager localTrustManager) throws NoSuchAlgorithmException, KeyStoreException
		{
			TrustManagerFactory var4 = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
			var4.init((KeyStore) null);
			defaultTrustManager = chooseTrustManager(var4.getTrustManagers());
			this.localTrustManager = localTrustManager;
		}

		@Override
		public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException
		{

		}

		@Override
		public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException
		{
			try
			{
				defaultTrustManager.checkServerTrusted(chain, authType);
			}
			catch (CertificateException ce)
			{
				localTrustManager.checkServerTrusted(chain, authType);
			}
		}

		@Override
		public X509Certificate[] getAcceptedIssuers()
		{
			return new X509Certificate[0];
		}
	}

	/**
	 * trust all the https point
	 * 
	 * @return
	 */
	public static SSLSocketFactory getSslSocketFactory()
	{
		X509TrustManager mTrustManager = new X509TrustManager()
		{
			@Override
			public X509Certificate[] getAcceptedIssuers()
			{
				return null;
			}

			@Override
			public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException
			{
			}

			@Override
			public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException
			{
			}
		};

		SSLContext sslContext = null;
		try
		{
			sslContext = SSLContext.getInstance("SSL");
			X509TrustManager[] xTrustArray = new X509TrustManager[]
			{ mTrustManager };
			sslContext.init(null, xTrustArray, new SecureRandom());
		}
		catch (Exception e)
		{
			e.printStackTrace();
		}
		return sslContext.getSocketFactory();
	}
}